Messages in this thread | | | Date | Thu, 31 Jan 2013 22:36:26 +0800 | From | Yuanhan Liu <> | Subject | Re: [PATCH] rwsem-spinlock: let rwsem write lock stealable |
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On Thu, Jan 31, 2013 at 02:12:28PM +0100, Ingo Molnar wrote: > > * Yuanhan Liu <yuanhan.liu@linux.intel.com> wrote: > > > BTW, mind to tell a nice test case for mmap_sem? > > this one was write-hitting on mmap_sem pretty hard, last I > checked: > > http://people.redhat.com/mingo/threaded-mmap-stresstest/
Thanks!
Is there any pass condition? I tested a while, at least I found no oops or any noisy from dmesg output. Is that OK?
Well, sometimes, it will quit peacefully. Sometimes it will not. ps -eo 'pid, state,wchan,comm' shows that it is sleeping at futex_wait_queue_me().
NOTE: this happens both with or w/o this patch. Thus it may not an issue introduced by this patch?
Thanks.
--yliu
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